Answer: I'm afraid your least favorite would be the best choice for the site you describe. What's nice about arborvitae is that they stay narrow so you won't need to prune them to make them fit. They are terrific screening shrubs and moderately fast growers. Cryptomeria is fast growing but I'm not sure how it will look if you need to shear off the lower branches. It's just as dense as arborvitae, so it will make a good hedging screen. So, of those that you've chosen, Cryptomeria or arborvitae are the best choices. Since both are reasonably fast growing, you can save some money by purchasing smaller plants. However, if quick screening is your goal, purchase the largest sizes you can afford.
Best wishes with your new screening hedge!
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